Kambal A, Wahab E M, Khattab A H
Trop Geogr Med. 1979 Mar;31(1):75-9.
Urolithiasis is common throughout the Sudan with the exception of the southern region where it is rare. The latter region is cooler and decidedly more moist than the other provinces during the hot months of the year (May-October). In the northern provinces urolithiasis is commoner in areas with lower relative humidity.
除苏丹南部地区外，尿石症在苏丹各地都很常见，而在南部地区则很少见。在一年中的炎热月份（5月至10月），后一地区比其他省份更凉爽且明显更湿润。在北部省份，相对湿度较低的地区尿石症更为常见。
