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2. 2) U.S. Food and Drug Administration, “Information about Nitrosamine Impurities in Medications.”: ‹https://www.fda.gov/drugs/drug-safety-and-availability/information-about-nitrosamine-impurities-medications›, cited 3 August, 2023.
3. 3) European Medicines Agency, “Nitrosamine impurities.”: ‹https://www.ema.europa.eu/en/human-regulatory/post-authorisation/referral-procedures/nitrosamine-impurities›, cited 3 August, 2023.
4. 4) Ministry of Health Labour and Welfare of Japan, “Self-inspection on Risks of Contamination with Nitrosamines in Drugs.”: ‹https://www.pmda.go.jp/files/000243438.pdf›, cited 31 March, 2020.
5. 5) European Medicines Agency, “ICH guideline M7(R1) on assessment and control of DNA reactive (mutagenic) impurities in pharmaceuticals to limit potential carcinogenic risk.”: ‹https://www.ema.europa.eu/en/documents/scientific-guideline/ich-guideline-m7r1-assessment-control-dna-reactive-mutagenic-impurities-pharmaceuticals-limit_en.pdf›, cited 3 August, 2023.