PCBs were the chemical most strongly associated with deformities and hatching success, though the presence of other chemicals in the eggs was a confounding factor.
(PCBs; were; the chemical most strongly associated with deformities and hatching success) (the chemical; most strongly associated; with deformities and hatching success) (the presence of other chemicals in the eggs; was; a confounding factor)
PCBs the chemical the presence of other chemicals in the eggs
were most strongly associated was
the chemical most strongly associated with deformities and hatching success
with deformities and hatching success
a confounding factor