LGALS1 and obesity due to melanocortin 4 receptor deficiency: Original papers on galectin-1 in association with obesity, insulin resistance and type 2 diabetes identified through a structured search in PubMed in August 2022 using the following terms: galectin-1 and obesity, galectin-1 and insulin resistance, galectin-1 and type 2 diabetes, totalling 23 publications.