title: iHammer.
authors.affiliation: Massachusetts General Hospital, Boston, MA.
authors.forename: Andrew L
authors.initials: AL
authors.lastname: Warshaw
authors.affiliation: Department of Surgery, Mayo Clinic College of Medicine, Rochester, MN. Electronic address: sarr.michael@mayo.edu.
authors.forename: Michael G
authors.initials: MG
authors.lastname: Sarr
mesh_terms: D006801:Humans; D063731:Mobile Applications; D012026:Reflex, Stretch