30  [Comment to Article 6.3: As is the case in most medical or scientific contexts, use of Samples and related information for qu ality assurance, quality improvement, method improvement and development or to establish reference populations is not c onsidered        WT 2021 Anti-Doping Rules  23  6.4 Standards for Sample  Analysis and Reporting   In accordance with Article 6.4  of the Code , WT shall ask laboratories to analyze Samples  in conformity with the International Standard for Laboratories and Article 4.7 of the International Standard for Testing  and Investigations.