Table 1.

Risk of Bias for non-randomized studies according to Newcastle-Ottawa Scale for non-randomized trials.

Study	Selection (4*)	Comparability (2*)	Outcome (3*)	NOS Score
McLaughlin et al., 2002	*   *		*	3/9
Amar et al., 2011	*   *  *	*	*	5/9
Massier et al., 2020	*   *	*	*	4/9
Amar et al., 2013	*   *  *		*   *	5/9
Amar et al., 2019	*   *  *		*   *	5/9
Lelouvier et al., 2016	*   *		*   *	4/9
Schierwagen et al., 2019	*   *  *		*   *	5/9