Authors: M H Lebel; B J Freij; G A Syrogiannopoulos; D F Chrane; M J Hoyt; S M Stewart; B D Kennard; K D Olsen; G H McCracken Journal: N Engl J Med Date: 1988-10-13 Impact factor: 91.245
Authors: E M Molyneux; A L Walsh; H Forsyth; M Tembo; J Mwenechanya; K Kayira; L Bwanaisa; A Njobvu; S Rogerson; G Malenga Journal: Lancet Date: 2002-07-20 Impact factor: 79.321