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. 2018 Nov 25;15(12):2639. doi: 10.3390/ijerph15122639

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Map of the study area including the districts in Piura, Peru (n = 33): Piura (0), Castilla (1), Catacaos (2), Cura Mori (3), El Tallan (4), La Arena (5), La Union (6), Frias (7), Pacaipampa (8), Huancabamba (9), Canchaque (10), El Carmen de la Frontera (11), Huarmaca (12), Lalaquiz (13), San Miguel de el Faique (14), Sondor (15), Sondorillo (16), Chulucanas (17), Buenos Aires (18), Chalaco (19), La Matanza (20), Morropon (21), Salitral (22), San Juan de Bigote (23), Santa Catalina de Mossa (24), Santo Domingo (25), Yamango (26), Sechura (27), Bellavista de la Union (28), Bernal (29), Cristos Nos Valga (30), Vice (31), Rinconada Llicuar (32).