Your search - wai yan yang ((fan de) or (van de)) patients ((1.8 among) OR (19 among)) farmers ;~ - did not match any resources.

Perhaps you should try some spelling variations:
1.8 among » 1.5 among, 1 among
yan yang » yang yang, yao yang, dan yang
wai yan » wang yan, wei yang
fan de » aan de, jan de, can de
van de » van der, van den

You may be able to get more results by adjusting your search query.