+ histology
263
+ gross
76
+ brain
42
+ nervous
42
+ eye
40
+ other
40
+ skin
33
+ gastrointestinal
27
+ gi
27
+ electron microscopy
25
+ aids
22
+ hiv
22
+ lung
20
+ patient
19
+ opportunistic diseases
15
+ small bowel
15
+ schistosoma
14
+ schistosomiasis
14
+ streptococcus
13
+ liver
12