Gonzales, Gustavo F., Vilma Tapia, Manuel Gasco, and Carlos Carrillo. 2011. “Maternal Hemoglobin in Peru: Regional Differences and Its Association With Adverse Perinatal Outcomes”. Revista Peruana De Medicina Experimental Y Salud Pública 28 (3). https://doi.org/10.17843/rpmesp.2011.283.527.