title: The piano key test: a clinical sign for the identification of subtle tarsometatarsal pathology.
authors.affiliation: Rheuma Clinic, Porto Alegre, Brazil.
authors.forename: Luciano S
authors.initials: LS
authors.lastname: Keiserman
authors.forename: James
authors.initials: J
authors.lastname: Cassandra
authors.forename: James A
authors.initials: JA
authors.lastname: Amis
mesh_terms: D033023:Foot Joints / Q000473:pathology*; D006801:Humans; D007592:Joint Diseases / Q000175:diagnosis*; D010338:Pathology, Clinical / Q000379:methods