Shakir AW, AL-Mosawi KM. Effect of Helfer skin tap technique on reducing pain in infants undergoing immunization. Adolescência e Saúde [Internet]. 2025 Dec. 24 [cited 2026 Jul. 2];20(4):19-33. Available from: https://adolescenciaesaude.com/index.php/aes/article/view/337