title: Facial erythema and onychoschizia.
authors.affiliation: Hospital General de Segovia, Segovia, Spain.
authors.forename: Juan
authors.initials: J
authors.lastname: Redondo-Mateo
authors.forename: Alfonso
authors.initials: A
authors.lastname: Urbon-Artero
mesh_terms: D000284:Administration, Oral; D001710:Biotin / Q000008:administration & dosage; D028921:Biotinidase Deficiency / Q000150:complications / Q000175:diagnosis* / Q000188:drug therapy; D002648:Child; D003937:Diagnosis, Differential; D004890:Erythema / Q000209:etiology / Q000473:pathology; D005148:Facial Dermatoses / Q000209:etiology / Q000473:pathology; D006801:Humans; D008297:Male; D009260:Nail Diseases / Q000209:etiology / Q000473:pathology
chemical_list: D001710:Biotin