Authors: M H Frick; O Elo; K Haapa; O P Heinonen; P Heinsalmi; P Helo; J K Huttunen; P Kaitaniemi; P Koskinen; V Manninen Journal: N Engl J Med Date: 1987-11-12 Impact factor: 91.245
Authors: D B Hunninghake; E A Stein; C A Dujovne; W S Harris; E B Feldman; V T Miller; J A Tobert; P M Laskarzewski; E Quiter; J Held Journal: N Engl J Med Date: 1993-04-29 Impact factor: 91.245