1. H. L. Broder, L. C. Richman, and P. B. Metheson .Effects of visible and invisible orofacial defects on self-perception and adjustment across developmental eras and gender., Cleft Palate Craniofac J, 1998 .35 :127 –131 .
2. D. Fox, J. Lynch, and B. Brookshire .Selected developmental factors of cleft palate children between two and thirty-three months of age., Cleft Palate J, 1978 .15 :239 –245 .
3. F. C. Fräser, The genetics of cleft lip and palate., Am J Hum Genet, 1970 .22 :336 –352 .
4. C. Hagberg, O. Larson, and J. Milerad .Incidence of cleft lip and palate and risks of additional malformations., Cleft Palate Craniofac J, 1997 .35 :40 –45 .
5. D. C. Harper, L. C. Richman, and B. C. Snider .School adjustment and degree of physical impairment., J Pediatr Psychol, 1980 .5 :377 –383 .