Asymmetric nerve enlargement: a characteristic of leprosy neuropathy demonstrated by ultrasonography - Lugão, Helena Barbosa; Nogueira-Barbosa, Marcello Henrique; Marques Júnior, Wilson; Foss, Norma Tiraboschi; Frade, Marco Andrey Cipriani (PLoS Neglected Tropical Diseases, 2015)