."there may be subtle differences (between animals and humans) that we don't know about," klein said. .he added: �these findings show that despite the tireless work of doctors and nurses, it appears that some cancer patients are still enduring shockingly long waits to start treatment. . . . advertisement . february 2016 (27) .: "evidence for decreased calcitonin gene-related peptide (cgrp) receptors and compromised responsiveness to cgrp of fetoplacental vessels in preeclamptic pregnancies."