High vitamin A intake in early pregnancy and major malformations: a multicenter prospective controlled study.
Mastroiacovo P, Mazzone T, Addis A, Elephant E, Carlier P, Vial T, Garbis H, Robert E, Bonati M, Ornoy A, Finardi A, Schaffer C, Caramelli L, Rodríguez-Pinilla E, Clementi M.
Mastroiacovo P, et al.
Teratology. 1999 Jan;59(1):7-11. doi: 10.1002/(SICI)1096-9926(199901)59:1<7::AID-TERA4>3.0.CO;2-6.
Teratology. 1999.
PMID: 9988877
Clinical Trial.