by Werkman, M. F., Landsman, J. A., Fokkens, A. S., Dijkxhoorn, Y. M., van Berckelaer-Onnes, I. A., Begeer, S., Reijneveld, S. A.
Published in Review journal of autism and developmental disorders (01.09.2023)

by Reneman, Michiel F, Fokkens, Andrea S, Dijkstra, Pieter U, Geertzen, Jan H B, Groothoff, Johan W
Published in Spine (Philadelphia, Pa. 1976) (15.01.2005)

by Fokkens, Wytske, Lund, Valerie, Mullol, Joaquim
Published in Zhonghua er bi yan hou tou jing wai ke za zhi = Chinese journal of otorhinolaryngology head and neck surgery (01.04.2008)