title: Photo quiz. All thumbs.
authors.affiliation: Wilford Hall Medical Center, Brooke Army Medical Center, San Antonio, TX 78259, USA.
authors.forename: J J
authors.initials: JJ
authors.lastname: Meffert
mesh_terms: D001521:Behavior Therapy; D003937:Diagnosis, Differential; D005260:Female; D006184:Habits; D006801:Humans; D008875:Middle Aged; D009264:Nails, Malformed / Q000175:diagnosis* / Q000209:etiology* / Q000628:therapy; D013315:Stress, Psychological / Q000150:complications; D013981:Tic Disorders / Q000150:complications*