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Schematic timeline for PTH secretory rate summarizing results presented in (Habener 1981; Brown et al. 1985; Schwarz et al. 1993; Tokumoto et al. 2005; Goodman and Quarles 2008). Darker color indicates higher PTH secretory rate. The adaptive mechanisms of the parathyroid gland operate on different time scales ensuring elevated PTH secretion over a long period of time.
