Authors: A L Stewart; S Greenfield; R D Hays; K Wells; W H Rogers; S D Berry; E A McGlynn; J E Ware Journal: JAMA Date: 1989-08-18 Impact factor: 56.272
Authors: Elizabeth A Bayliss; John F Steiner; Douglas H Fernald; Lori A Crane; Deborah S Main Journal: Ann Fam Med Date: 2003 May-Jun Impact factor: 5.166