Table 3.
Result of systematic literature search
| Assessment | N = 40 | % |
|---|---|---|
| No cost study | 26 | 65 |
| No PPP | 5 | 12.5 |
| In USA/Europe | 5 | 12.5 |
| Not in area of health service | 1 | 2.5 |
| Valid | 3 | 7.5 |
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