| web | http://www.iarc.fr/en/media-centre/iarcnews/pdf/MonographVolume112.pdf |
| publication | International Agency for Research on Cancer |
| date | 2015-03-20 |
| web | Arthur Neslen | The Guardian | 2016-05-17 | |
| web | Carey Gillam | Reuters | 2015-03-25 |
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