A Digital Tool for Clinical Evidence–Driven Guideline Development by Studying Properties of Trial Eligible and Ineligible Populations: Development and Usability Study - Shahzad Mumtaz; Megan McMinn; Christian Cole; Chuang Gao; Christopher Hall; Magalie Guignard-Duff; Huayi Huang; David A McAllister; Daniel R Morales; Emily Jefferson; Bruce Guthrie (Journal of Medical Internet Research)