Authors: Julia Hippisley-Cox; Martina Patone; Xue W Mei; Defne Saatci; Sharon Dixon; Kamlesh Khunti; Francesco Zaccardi; Peter Watkinson; Manu Shankar-Hari; James Doidge; David A Harrison; Simon J Griffin; Aziz Sheikh; Carol A C Coupland Journal: BMJ Date: 2021-08-26