Authors: Gary W K Wong; Fanny W S Ko; David S C Hui; Tai F Fok; David Carr; Erika von Mutius; Nan S Zhong; Yu Z Chen; Christopher K W Lai Journal: BMJ Date: 2004-08-28
Authors: B Alm; N Aberg; L Erdes; P Möllborg; R Pettersson; S G Norvenius; E Goksör; G Wennergren Journal: Arch Dis Child Date: 2008-09-25 Impact factor: 3.791