Can someone tell me the name of this referencing style please?

In-Text:
Notably,thyroid-stimulating hormone levels peak in winter and dip in summer, exhibiting a negative correlation with temperature. [16] Superscript

[16] Yoshimoto H, Yamakawa K, Umemura Y, et al. Seasonal variation and severity of acute abdomen in Japan: a nine-year retrospective analysis. J Pers Med. 2021;11:1346.

Journal: https://journals.lww.com/md-journal/pages/default.aspx