Fig. 1From: Identifying biases and their potential solutions in human microbiome studiesThe various stages that can introduce bias in sequenced-based human microbiome studies. Each blue box represents a stage in either DNA marker gene sequencing or DNA shotgun sequencing experiments. Orange boxes represent the various areas within a stage that can result in the introduction of systemic bias. Figure created using images from Servier Medical Art (http://smart.servier.com)Back to article page