Authors: Rishi Mandavia; Gerjon Hannink; Muhammad Nayeem Ahmed; Yaami Premakumar; Timothy Shun Man Chu; Helen Blackshaw; Tanjinah Ferdous; Nishchay Mehta; Joseph Manjaly; Maha Khan; Anne Gm Schilder Journal: BMJ Open Date: 2020-09-28 Impact factor: 2.692