Pereira, I. B.; Oliveira, M. M. M. de; Ferreira, P. B. P.; Coutinho, R. P.; Cameron, L. E.; Porto, I. S. Ultra-Structural Evaluation of Needles and Their Role for Comfort During Subcutaneous Drug Administration. Rev. Esc. Enferm. USP 2018, 52, e03307. https://doi.org/10.1590/s1980-220x2017024003307.