Map of study area in the northern Amazon region of Peru. Nora Moore Brittany Blouin Hugo Razuri Martin Casapia Theresa W. Gyorkos 10.1371/journal.pone.0171136.g001 https://plos.figshare.com/articles/figure/Map_of_study_area_in_the_northern_Amazon_region_of_Peru_/4663534 <p>Red stars show the location of the two study health centres (H.C.).</p> 2017-02-16 20:58:12 aOR ANC registries antenatal care clinics case-control study Objective ANC visit CI Main outcome measure Case-control status