Meng, Xin; Qian, Nancy - 2009
best of our knowledge, this is the �rst study
to apply quantile analysis or to use survivor cohort size for studying the … collectives to not use chemical fertilizers. And to the best of
our knowledge, use of heavy machinery such as tractors was …
distribution are more adversely a�ected. To the best of our knowledge, there is no evidence from
the medical or epidemiological …