Supplementary Table 1.

The Somatic Symptom Scale-8 (SSS8).

	Not at all	A little bit	Somewhat	Quite a bit	Very much
1. Stomach or bowel problems	0	1	2	3	4
2. Back pain	0	1	2	3	4
3. Pain in your arms, legs, or joints	0	1	2	3	4
4. Headaches	0	1	2	3	4
6. Dizziness	0	1	2	3	4
5. Chest pain or shortness of breath	0	1	2	3	4
7. Feeling tired or having low energy	0	1	2	3	4
8. Trouble sleeping	0	1	2	3	4