12 Neerman-Arbez Neerman-Arbez M M Honsberger Honsberger A A Antonarakis Antonarakis SE SE Morris Morris MA MA Deletion of the fibrinogen alpha-chain gene (FGA) causes congenital afibrinogenemia Deletion of the fibrinogen alpha-chain gene (FGA) causes congenital afibrinogenemia J Clin Invest. The gene discussed is FGA; the disease is Familial afibrinogenemia.