1. 1) Ministry of Health, Labour and Welfare, Japan. Press release “Iyakuhin jishu kaishū no oshirase (class 1).”, 6 July, 2018: ‹https://www.mhlw.go.jp/stf/newpage_00086.html›, cited 11 December, 2018.
2. 2) IARC Working Group on the Evaluation of Carcinogenic Risks to Humans. IARC Monographs on the evaluation of the carcinogenic risk of chemicals to humans. Some N-Nitroso Compounds, 17, 125–175 (1978).
3. 3) Ministry of Health, Labour and Welfare, Japan. Notification “Barusarutan seizai ni okeru hatsugan busshitsu no kenshutsu ni taisuru taiō ni tsuite.” 7 September, 2018: ‹https://www.mhlw.go.jp/content/11121000/000360273.pdf›, cited 11 December, 2018.
4. 4) ASKA Pharmaceutical Co., Ltd. “Barusarutan jō ‘AA’ ni kakaru seihin kaishū oyobi sesshu ni tomonau risuku hyōka ni kansuru hōkoku-sho.” 25 August 2018: ‹https://www.mhlw.go.jp/content/11121000/000360269.pdf›, cited 11 December, 2018.
5. 5) European Medicines Agency. “Update on review of valsartan medicines due to detection of NDMA: EMA reviewing valsartan produced by another company Zhejiang Tianyu.” 10 August, 2018: ‹ https://www.ema.europa.eu/en/news/update-review-valsartan-medicines-due-detection-ndma-ema-reviewing-valsartan-produced-another›, cited 11 December, 2018.