Effectiveness and Tolerability of a Standardized Extract from Ageratina pichinchensis on Patients with Tinea Pedis: An Explorative Pilot Study Controlled with Ketoconazole - Romero-Cerecero, Ofelia; Rojas, Gabriela; Navarro, Víctor; Herrera-Arellano, Armando; Zamilpa-Álvarez, Alejandro; Tortoriello, Jaime (Planta Medica, 2006)