Diyari AK Lor, et al. “Does Expression of Substance-P in Normal Appendices Confirm the Neuroimmune Appendicitis or Disprove the Negative Appendectomy?”. Journal of Population Therapeutics and Clinical Pharmacology, vol. 30, no. 3, Mar. 2023, pp. 331-45, https://doi.org/10.47750/jptcp.2023.30.03.035.