Table 5.

Risk of bias summary for Non-Randomised Controlled Trial Studies

	Bias due to confounding	Bias in selection of participants into the study	Bias in classification of interventions	Bias due to deviations from intended interventions	Bias due to missing data	Bias in measurement of outcomes	Bias in selection of the reported result
Al-Hussaini et al., 2001 [9]	Low	Low	Low	Low	Low	Moderate	Low
Khurana & Dhar, 2000 [10]	Low	Low	Low	Low	Low	Moderate	Low
Emavardhana & Tori, 1997 [11]	Low	Low	Low	Low	Low	Moderate	Low
Chandiramani et al., 1995 [12]	Low	Low	Low	Low	Low	Moderate	Low
Garland et al., 2009 [13]; Garland, 2007 [14]; Angen et al., 2002 [15]	Low	Low	Low	Low	Low	Moderate	Low
Ornish et al., 2013 [16]; Ornish et al., 2008 [17]	Low	Low	Low	Low	Low	Low	Low