Depression among older adults in Norway 1995–2019: Time trends, correlates, and future projections in a population study: The HUNT study - Maria Lage Barca; Eivind Aakhus; Ellen Melbye Langballe; Thomas Hansen; Ragnhild Holmberg Aunsmo; Geir Selbæk; Steinar Krokstad; Bjørn Heine Strand (PLoS ONE)