Callosities

• Institute of Nutrition of Central America and Panama — Guatemala City, Departamento de Guatemala, Guatemala

• INQUIS Clinical Research — Toronto, Ontario, Canada

• Service de Chirurgie Orthopédique Pédiatrique - CHU de Strasbourg - France — Strasbourg, France

• Podiatry Services, West Community Services — Galway, Ireland

• Carlanderska Hospital — Gothenburg, Sweden

• Beatriz B Martinez — Pouso Alegre, Minas Gerais, Brazil

• The Hospital for Sick Children — Toronto, Ontario, Canada

• Hanang' — Manyara, Manyara Region, Tanzania
• Rungwe — Mbeya, Tanzania
• Kilosa — Morogoro, Tanzania

Not specified

• University of Colorado Anschutz Medical Campus — Aurora, Colorado, United States
• Universidad Francisco Marroquin — Guatemala City, Guatemala