Selection of zidovudine resistance mutations and escape of human immunodeficiency virus type 1 from antiretroviral pressure in stavudine-treated pediatric patients. - Maxeiner HG; Keulen W; Schuurman R; Bijen M; de Graaf L; van Wijk A; Back N; Kline MW; Boucher CA; Nijhuis M (The Journal of infectious diseases, 2002)