Corrigendum: Assessing the Diversity and Distribution of Apicomplexans in Host and Free-Living Environments Using High-Throughput Amplicon Data and a Phylogenetically Informed Reference Framework - del Campo, Javier; Heger, Thierry J.; Rodríguez-Martínez, Raquel; Worden, Alexandra Z.; Richards, Thomas A.; Massana, Ramon; Keeling, Patrick J. (Frontiers in Microbiology, 2020)