Atypical femoral fractures: what do we know about them?: AAOS Exhibit Selection. - Unnanuntana A; Saleh A; Mensah KA; Kleimeyer JP; Lane JM; Unnanuntana, Aasis; Saleh, Anas; Mensah, Kofi A; Kleimeyer, John P; Lane, Joseph M (Journal of Bone & Joint Surgery, American Volume, 2013)