Search by Medical Condition A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Clinical Trials for Porphyria, Variegate Study to Evaluate the Safety and Efficacy of Afamelanotide in Patients With Variegate Porphyria (VP) ENVISION: A Study to Evaluate the Efficacy and Safety of Givosiran (ALN-AS1) in Patients With Acute Hepatic Porphyrias (AHP) Acute Porphyria Biomarkers for Disease Activity