In PubMed, a search for “MTNR1B” AND “obesity” returned 9 documents, of which two (PMID: 20200315, 19088850) matched the PubMed abstracts selected by InfoCodex to substantiate its identification of MTNR1B as an obesity phenotype. The gene discussed is MTNR1B; the disease is obesity due to melanocortin 4 receptor deficiency.