TI - Familial predisposition for herniation of a lumbar disc in patients who are less than twenty-one years old PT - JOUR DP - 1991 TA - The Journal of Bone & Joint Surgery PG - 124-128 VI - 73 IP - 1 AID - [doi] 4100 - http://dx.doi.org/ SO - The Journal of Bone & Joint Surgery January 1, 1991 73(1):124