AUTHOR=Pronto-Laborinho Ana Catarina , Lopes Catarina S. , Conceição Vasco A. , Gromicho Marta , Santos Nuno C. , de Carvalho Mamede , Carvalho Filomena A. TITLE=Corrigendum: γ′ Fibrinogen as a Predictor of Survival in Amyotrophic Lateral Sclerosis JOURNAL=Frontiers in Cardiovascular Medicine VOLUME=8 YEAR=2021 URL=https://www.frontiersin.org/journals/cardiovascular-medicine/articles/10.3389/fcvm.2021.800151 DOI=10.3389/fcvm.2021.800151 ISSN=2297-055X