Eales L
S Afr Med J. 1978 Dec 16;54(25):1050-2.
An open trial with canthaxanthin, a photoprotective agent, was carried out on 7 patients with erythrohepatic protoporphyria (EHP), 5 patients with variegate porphyria (VP), and 2 patients with symptomatic porphyria (SP). In 4 of the 7 patients with EHP, sun tolerance was significantly but only moderately increased. In 2 children sun tolerance was greatly increased. Only 2 of the 5 patients with VP and 1 of the 2 patients with SP showed any improvement.
对7例红细胞生成性原卟啉病（EHP）患者、5例杂合性卟啉病（VP）患者和2例症状性卟啉病（SP）患者进行了一项使用光保护剂角黄素的开放性试验。在7例EHP患者中，有4例的日光耐受性显著但仅适度增加。在2名儿童中，日光耐受性大幅提高。5例VP患者中只有2例、2例SP患者中只有1例有任何改善。
