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Comparison of published papers based on modalities of telemedicine from 1995 to 2015.
| Type of modality | Usage count | Usage percentage |
| Video (VTC and others) | 25 | 27% |
| Still pictures | 23 | 25% |
| Audio (Radio, telephone, and others ) | 18 | 19% |
| Text (Email and others) | 16 | 17% |
| Others ( Bio-signal, medical data, and others) | 11 | 12% |
