Table 1: Features of participants and samples.
| Features of Participants and Samples | ||||||||||
| Patient | Sex | Age | Country | Profession | Samples Analyzed | |||||
| Preoperative | Postoperative | |||||||||
| -1 | 1st | 2nd | 7 | 14 | 30 | |||||
| A | female | 31 | china | worker | 1 | 1 | 1 | 1 | 1 | 1 |
| B | female | 34 | china | teacher | 1 | 1 | 1 | 1 | 1 | 1 |
| C | female | 35 | china | doctor | 1 | 1 | 1 | 1 | 1 | 1 |
| D | male | 40 | china | entrepreneur | 1 | 1 | 1 | 1 | 1 | 1 |