Impact of loneliness on suicidal ideation during the COVID-19 pandemic: findings from a cross-sectional online survey in Japan by Takahiro Tabuchi, Ryo Okubo, Hirokazu Tachikawa, Midori Matsushima, Haruhiko Midorikawa, Miyuki Aiba

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Does awake prone positioning prevent the use of mechanical respiratory support or death in COVID-19 patients on standard oxygen therapy hospitalised in general wards? A multicentre... by Benjamin Planquette, Christophe Perrin, Thierry Boulain, Mai-Anh Nay, Louis Bernard, Laurent Plantier, Léa Colombain, Jérémy Clément, Aymeric Sève, Sylvie Druelle, Marine Morrier, Jean-Baptiste Lainé, Grégory Corvaisier, Nicolas Bizien, Xavier Pouget-Abadie, Adrien Bigot, Elsa Nyamankolly, Guillaume Fossat

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Vulnerability for alcohol use disorder after adverse childhood experiences (AUDACE): protocol for a longitudinal fMRI study assessing neuropsychobiological risk factors for relapse by Falk Kiefer, Cagdas Türkmen, Noah Machunze, Haoye Tan, Sarah Gerhardt, Sabine Vollstädt-Klein

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Effects and utility of an online forward triage tool during the SARS-CoV-2 pandemic: a mixed method study and patient perspectives, Switzerland by Thomas C Sauter, Wolf E Hautz, Martin Müller, Meret E Ricklin, Janet Michel, Annette Mettler, Raphael Stuber, Philipp Jent

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On the time spent preparing grant proposals: an observational study of Australian researchers by Nicholas Graves, Adrian G Barnett, Philip Clarke, Danielle L Herbert

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Does improving sleep lead to better mental health? A protocol for a meta-analytic review of randomised controlled trials by Georgina Rowse, Alexander J Scott, Thomas L Webb

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Incomplete recovery in patients with minor head injury directly discharged home from the emergency department: a prospective cohort follow-up study by Bram Jacobs, Joukje van der Naalt, Jan Cornelis ter Maaten, Sophie Maria Coffeng, Laura Jane Kim

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Barriers and facilitators regarding the implementation of policies and programmes aimed at reducing adolescent pregnancy in Ghana: an exploratory qualitative study by Melissa Kang, Bright Opoku Ahinkorah, Lin Perry, Fiona Brooks

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COVID-19 in the context of pregnancy, infancy and parenting (CoCoPIP) study: protocol for a longitudinal study of parental mental health, social interactions, physical growth and c... by Topun Austin, Jane Barlow, Ezra Aydin, Staci M Weiss, Kevin A Glasgow, Mark H Johnson, Sarah Lloyd-Fox

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Cognitive prehabilitation for geriatric patients undergoing elective surgery: a PRISMA-P-compliant protocol for a systematic review by Yu He, Nianyi Sun, Wenchen Zou, Anren Zhang, Xiaochai Han, Caitao Chen

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Medication following bariatric surgery for type 2 diabetes mellitus (BY-PLUS) study: rationale and design of a randomised controlled study by Alexander Dimitri Miras, Carel le Roux, Alexis Sudlow, Ricardo Vitor Cohen, Hassan Kahal, Dimitri J Pournaras, Jill Townley, Helen Heneghan

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Barriers and facilitators to global access to life-saving skills training: an international cross-sectional survey by Marcus Eng Hock Ong, Freddy Lippert, Lin Zhang, Willem Stassen, So Yeon Joyce Kong, Audrey L Blewer, Yeh Lai Chern, Andrew Fu Wah Ho

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Development of a machine learning-based prediction model for extremely rapid decline in estimated glomerular filtration rate in patients with chronic kidney disease: a retrospectiv... by Shingo Fukuma, Yukio Yuzawa, Daijo Inaguma, Hiroki Hayashi, Ryosuke Yanagiya, Akira Koseki, Toshiya Iwamori, Michiharu Kudo

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Prevalence of vitamin D deficiency and its association with adverse obstetric outcomes among pregnant women in Uganda: a cross-sectional study by Cristina Reverzani, Daniel Zaake, Faridah Nansubuga, Herman Ssempewo, Leonard Manirakiza, Anthony Kayiira, Gilbert Tumwine

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Preferences and access to community-based HIV testing sites among men who have sex with men (MSM) in Côte d’Ivoire by Christine Danel, Joseph Larmarange, Lazare Sika, Maxime Inghels, Arsène Kra Kouassi, Serge Niangoran, Anne Bekelynck, Séverine Carilon, Mariatou Koné, Annabel Degrées du Loû

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Protocol for a qualitative study to explore acceptability, barriers and facilitators of the implementation of new teleophthalmology technologies between community optometry practic... by Ann Blandford, Konstantinos Balaskas, Rima Hussain, Sarah Abdi, Angela Aristidou, Josie Carmichael, Giulia Cappellaro

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How effective and cost-effective are behaviour change interventions in improving the prescription and use of antibiotics in low-income and middle-income countries? A protocol for a... by Mishal Khan, Virginia Wiseman, Neha Batura, Carla Cuevas

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RECIST 1.1 versus mRECIST for assessment of tumour response to molecular targeted therapies and disease outcomes in patients with hepatocellular carcinoma: a systematic review and... by Yao Yang, Yuping Bai, Hongli Yu, Qiang Zhu, Xiaoyu Xie, Yuemin Feng

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What is the NCD service capacity and disruptions due to COVID-19? Results from the WHO non-communicable disease country capacity survey in the Americas region by Anselm Hennis, Silvana Luciani, Roberta Caixeta, Carolina Chavez, Dolores Ondarsuhu

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Protocol for the development and multisite validation of the Quality of Dying and Death-Revised Global Version scale by Camilla Zimmermann, Ekaterina An, Sarah Hales, Gary Rodin, Eve Namisango, Kenneth Mah, Lameck Thambo, Christian Ntizimira, Alyssa Tilly, Warren Lewin, Mano Chandrakumar, Arnell Baguio, Nazira Jaffer, Maria Chikasema, Kayla Wolofsky, Mary Goombs

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