Yoon Jung, J.; Hoon Kwon, H.; Soo Hong, J.; Young Yoon, J.; Sun Park, M.; Young Jang, M.; Hun Suh, D. Effect of Dietary Supplementation With Omega-3 Fatty Acid and Gamma-Linolenic Acid on Acne Vulgaris: A Randomised, Double-Blind, Controlled Trial. Acta Derm Venereol 2014, 94, 521-525.