| remain controversial | 0.25 |
| vary to person | 0.25 |
| mild | 0.58 |
| rare | 0.52 |
| minimal | 0.52 |
| unknown | 0.49 |
| short-lived | 0.46 |
| psychological | 0.46 |
| more pronounced | 0.42 |
| significant | 0.42 |
| strong | 0.35 |
| gastrointestinal | 0.34 |
| More » |
| investigated | 0.49 |
| reported | 0.42 |
| felt | 0.29 |
| associated with proton … | 0.25 |
| reduced | 0.25 |
| noted | 0.22 |
| observed | 0.19 |
| documented | 0.16 |
| increased | 0.16 |