[1] Department of Ophthalmology,
[2] Hokkaido University School of Medicine,undefined
[3] Kita-15,undefined
[4] Nishi-7,undefined
[5] Kita-ku,undefined
[6] Sapporo 060,undefined
[7] Japan,undefined
[8] Tel. +81-11-716-1161 ext. 5944; Fax +81-11-736-0952,undefined
[9] Department of Orthopedics,undefined
[10] Sapporo National Hospital,undefined
[11] Sapporo,undefined
[12] Japan,undefined