An increased iliocapsularis-to-rectus-femoris ratio is suggestive for instability in borderline hips. - Haefeli, Pascal; Steppacher, Simon; Babst, Doris; Siebenrock, Klaus; Tannast, Moritz; Haefeli, Pascal Cyrill; Steppacher, Simon Damian; Siebenrock, Klaus Arno (Clinical Orthopaedics & Related Research®, 2015)