Blood Institute. 2015-09-10 [2016-03-06]. (原始内容存档于2016-04-06). Campbell, Norm R. C.; Lackland, Daniel T.; Lisheng, Liu; Niebylski, Mark L.; Nilsson, Peter
densely packed homes were frequent in neighborhoods where overcrowding was the norm. While the average residential density for Lagos was about 260 people per