**3. Results**

Our search results yielded 382 references. After removing duplicates, 270 were screened using title and abstracts, and 47 references were considered relevant for full-text screening. Considering the a priori inclusion criteria and obtaining additional clarifying information from authors of some of the references, twelve studies (17 reports) were ultimately included [10,28–30,38–45]. The flow of studies through the screening process of the review is shown in Figure 1. The excluded studies and the reasons for exclusion are shown in Table A2.

**Figure 1.** Adapted version of PRISMA flow diagram of study selection for the ME/CFS systematic review.

*3.1. Characteristics of the Included Studies*

> Table 2 shows the characteristics of all the included studies.



Control: 87.5% female






*Medicina* **2021**, *57*, 652

**Table 2.** *Cont*.

\* 2 dropped out before the intervention \*\* 4 dropped out before the intervention ˆ 5 dropped out before the intervention ˆˆ 12 dropped out before the intervention.
