Tania ADesrosiers, Christina CLawson, Robert EMeyer, David BRichardson, Julie LDaniels, Martha AWaters, Edwinvan Wijngaarden, Peter HLanglois, Paul ARomitti, AdolfoCorrea, AOlshan, and the National Birth Defects Prevention Study
StefanoMattioli, AndreaFarioli, Robin M TCooke, AlbertoBaldasseroni, JaniRuotsalainen, DonatellaPlacidi, StefaniaCurti, GianpieroMancini, MauroFierro, GiuseppeCampo, FrancescaZanardi, Francesco SViolante