Authors: Jan De Maeseneer; Richard G Roberts; Marcelo Demarzo; Iona Heath; Nelson Sewankambo; Michael R Kidd; Chris van Weel; David Egilman; Charles Boelen; Sara Willems Journal: Lancet Date: 2011-09-05 Impact factor: 79.321
Authors: A B Bindman; K Grumbach; D Osmond; M Komaromy; K Vranizan; N Lurie; J Billings; A Stewart Journal: JAMA Date: 1995-07-26 Impact factor: 56.272
Authors: Thomas E Cowling; Elizabeth V Cecil; Michael A Soljak; John Tayu Lee; Christopher Millett; Azeem Majeed; Robert M Wachter; Matthew J Harris Journal: PLoS One Date: 2013-06-12 Impact factor: 3.240
Authors: John Robson; Isabel Dostal; Aziz Sheikh; Sandra Eldridge; Vichithranie Madurasinghe; Chris Griffiths; Carol Coupland; Julia Hippisley-Cox Journal: BMJ Open Date: 2016-01-13 Impact factor: 2.692