ELMeneza S, ElBagoury I, Tawfik E, Tolba A. Study of Neuropeptide Substance P as A Marker of Pain in Newborn Infant. Open Access Maced J Med Sci [Internet]. 2021 Nov. 28 [cited 2024 Aug. 24];9(B):1615-20. Available from: https://oamjms.eu/index.php/mjms/article/view/7444