Catambing, Irene, and Michael Villa. “Ultrasonographic Measurement of Skin and Subcutaneous Thickness at Insulin Injection Sites Among Adult Filipinos With Diabetes”. Journal of the ASEAN Federation of Endocrine Societies, vol. 29, no. 1, May 2014, p. 24, https://asean-endocrinejournal.org/index.php/JAFES/article/view/112.