External high quality control, generally known as exterior top quality assessment (EQA) or proficiency testing (PT), is a significant method for ensuring the precision and trustworthiness of laboratory screening.[seventy nine] With this assessment, surrogate samples are furnished by an impartial external organization, as well as laboratory is unaware with the http://puurpositief.nl/24-uurszorg-thuis-dag-en-nachtzorg-bij-u-thuis/