Adolescent 2 Adult Amyloid Neuropathies, Familial 2 Argentina 2 Familial amyloidotic polyneuropathy 2 Female 2 Humans 2 Male 2 Mass Screening 2 Mutation 2 Polymerase Chain Reaction 2 Polymorphism, Restriction Fragment Length 2 Portugal 2 Prealbumin 2 TTR Val30Met mutation 2 Transthyretin 2 Young Adult 2 adolescent 2 adult 2 amino acid substitution 2 amyloid 2 article 2 autosomal dominant disorder 2 clinical article 2 diagnostic procedure 2 early diagnosis 2 ethnology 2 familial amyloid polyneuropathy 2 female 2 gene amplification 2