Wolpowitz A, van Heerden J, Punt A M, van de Werke I, Scholtz A, Hartley L
S Afr Med J. 1979 Dec 8;56(24):1043-4.
A survey of carcinoma of the oesophagus at Kalafong Hospital revealed a greater incidence of the disease in males, being highest in the age group 50 - 59 years, with the middle third of the oesophagus the most prevalent site and with oesophagotracheal or oesophagobronchial fistulae a common complication.
在卡拉方医院对食管癌进行的一项调查显示，该病在男性中的发病率更高，在50至59岁年龄组中发病率最高，食管中段是最常见的发病部位，食管气管瘘或食管支气管瘘是常见的并发症。
