http://www.cathlabdigest.com/articles/Is-Sterile-Technique-Vital-Cath-Lab
http://www.cathlabdigest.com/articles/Do-I-Need-Wear-a-Hat-and-Mask-Cath-Lab
https://www.ncbi.nlm.nih.gov/m/pubmed/16331649/
https://www.medpagetoday.com/cardiology/pci/31801