W. Li, Z. Shen, Z. Zhang, W. Zhang, D. Kerob, and C. Li, “The efficacy and safety of a cream containing salicylic acid, lipohydroxy acid, nicotinamide and piroctone olamine combined with 5% Benzoyl Peroxide in the treatment of acne vulgaris: a randomized controlled study”, J of Skin, vol. 6, no. 6, p. s88, Nov. 2022.