title: DOs question intent of challenge.
authors: K C
authors: KC
authors: Zorski
authors: K N
authors: KN
authors: Woeller
authors: C M
authors: CM
authors: Galin
authors: S
authors: S
authors: Nani
authors: G P
authors: GP
authors: Myers
authors: J R
authors: JR
authors: Greenfield
authors: B
authors: B
authors: Sendzicki
authors: A H
authors: AH
authors: Haltof
mesh_terms: D006801:Humans; D008349:Manipulation, Orthopedic / Q000592:standards* / Q000639:trends; D010021:Osteopathic Medicine / Q000379:methods*; D012680:Sensitivity and Specificity; D012886:Skull