| A Biophysically-Based Spectral Model of Light Interaction with Human Skin Recent countries visiting this post |  |
 | 7 | United States |
 | 3 | China |
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| A Biophysically-Based Spectral Model of Light Interaction with Human Skin Recent countries visiting this post | |
| 7 | United States |
| 3 | China |
| 1 | |
| 1 | Russian Federation |