TY  - JOUR
AU  - Ohzono, K
AU  - Saito, M
AU  - Takaoka, K
AU  - Ono, K
AU  - Saito, S
AU  - Nishina, T
AU  - Kadowaki, T
DO  - doi:10.1302/0301-620X.73B1.1991778
UR  - https://doi.org/10.1302/0301-620X.73B1.1991778
TI  - Natural history of nontraumatic avascular necrosis of the femoral head
T2  - The Journal of Bone & Joint Surgery British Volume
VL  - 73-B
IS  - 1
PY  - 1991
SP  - 68
EP  - 72
ER  -