PTH and hyperparathyroidism: PTH level immediately returned to the normal at 10 min postoperatively, and remained normal at 20 min, 4 h, 24 h, 1 month, 2 months, 3 months, 4 months, 7 months and 8 months postoperatively, suggesting the complete remission of hyperparathyroidism (Figure 4, Supplementary Table 1).