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| article supplementary file uploaded. | 19 July 2013 09:04 CEST | - | https://www.mdpi.com/1424-2818/5/3/522#supplementary |
| article pdf uploaded. | 18 July 2013 12:28 CEST | Version of Record | https://www.mdpi.com/1424-2818/5/3/522/pdf |