Acetabular Component Positioning in Total Hip Arthroplasty With and Without a Computer-Assisted System: A Prospective, Randomized and Controlled Study - Gurgel, Henrique M. C.; Croci, Alberto T.; Cabrita, Henrique A. B. A.; Vicente, José Ricardo N.; Leonhardt, Marcos C.; Rodrigues, João Carlos (The Journal of Arthroplasty, 2014)