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doi: 10.1007/978-1-0716-1270-5_16

10.1002/tox.22736 Environ

Similarly, hypophysectomy in humans results in a rapid decrease in GFR, even when patients receive hormone replacement for all pituitary deficiencies, except GH [130]

Umbrello et al., 2013)

I think we can safely say the overwhelming answer would be (b)
