Abdollahi et al. (2011) [75] | This study is a pilot study of Abdollahi et al. (2014) [52]. |
Agostini et al. (2011) [76] | This study lack of control group. |
Arab Baniasad et al. (2014) [77] | It is a conference abstract, possibly lack of control group as well. |
Badia et al. (2008) [78] | It is the same study as the one of Cameirao et al. (2008) |
Basteris et al. (2014) [79] | It is a review |
Beling et al. (2015) [80] | It is a conference abstract, and it does not have the intervention of interest |
Broeren et al. (2007) [81] | It does not have the intervention of interest. |
Cameirao et al. (2012) [82] | It does not have the intervention of interest. |
Cameirao et al. (2008) [83] | It is a review. |
Casadio et al. (2009) [84] | It does not have the intervention of interest and lacks of a control group. |
Chemuturi et al. (2013) [85] | This study only recruited healthy subjects and it does not have an the intervention of interest. |
Chemuturi et al. (2013) [86] | This study by the same authors as above also only recruited healthy subjects and it does not have an the intervention of interest. |
Coote et al. (2008) [87] | This study lacks a control group of interest. |
Crocher et al. (2012) [88] | This study does not have interventions of interest or results of interest. |
De Santis et al. (2015) [89] | This study does not have a control group and it lacks outcomes of interest. |
Fasoli et al. (2004) [90] | This study does not have a proper control group. |
Fischer et al. (2016) [91] | This study does not have the intervention of interest. |
Fluet et al. (2011) [92] | It is a conference abstract. |
Fluet et al. (2012) [93] | It is a book. |
Fluet et al. (2014) [94] | This study does not have the intervention of interest. |
Hachisuka et al. (2014) [95] | It is a conference abstract. |
Housman et al. (2009) [96] | It is the same study as the one of Rozario et al. (2009) [60]. |
Huang and Patton(2011) [97] | It has the same results as the one of Huang and Patton(2013) [59]. |
Israely and Carmeli (2016) [40] | It is a review. |
Krebs et al. (2008) [98] | This study does not have the intervention of interest. |
Lam et al. (2008) [99] | This study only has healthy subjects, and it lacks of the intervention of interest. |
Lambercy et al. (2011) [100] | This study lacks of a control group. |
Lemmens et al. (2012) [101] | It is a conference abstract. |
Liao et al. (2012) [102] | This study does not have the intervention of interest. |
Lin et al. (2015) [103] | This study does not have the intervention of interest. |
Milot et al. (2016) [104] | This paper is about design and implementation, and not intervention-oriented. |
Oblak et al. (2010) [105] | This paper is not intervention-oriented. |
Orihuela-Espina et al. (2016) [106] | This study does not have the intervention of interest. |
Patton and Mussa-Ivaldi (2004) [107] | This study only recruited healthy subjects. |
Perry et al. (2011) [108] | This study is not intervention-oriented. |
Phyo et al. (2016) [109] | This study lacks of the intervention and results of interest. |
Squeri et al. (2014) [110] | This study lacks of a control group. |
Stein et al. (2004) [111] | This study contains subjects under 21 years old. |
Timmermans et al. (2012) [112] | It is a conference abstract. |
Timmermans et al. (2012) [113] | It is another conference abstract by the same author as above. |
Turolla et al. (2013) [114] | This study does not have a control group. |
Waldner et al. (2009) [115] | This study is not intervention-oriented. |
Ziheri et al. (2010) [116] | This study does not have the intervention or control of interest. |
Zondervan et al. (2013) [117] | This study does not have the intervention of interest. |