| web | http://www.renewamerica.com/columns/janak/081119 |
| author | Dr. Sheela Sathyanarayana and Wendy Hessler |
| publication | Environmental Health News |
| date | 2007-07-05 |
| web | Wang SX, Wang ZH, Cheng XT | Environ Health Perspect | 2007-01-09 |
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