by WIESSING, L. G, VAN ROOSMALEN, M. S, KOEDIJK, P, BIELEMAN, B, HOUWELING, H
Published in AIDS (London) (12.11.1999)

by Menko, F H, Koedijk, P H, Baart, J A, Kwee, M L
Published in The Cleft palate journal (01.07.1988)