“…A total of 621 articles were retrieved initially by literature searches. The assessment of titles, abstracts, and full texts led to the inclusion of 24 articles in this systematic review ((Tonetti et al 1998, Checchi et al 2002, , Far-dal et al 2004, Chambrone & Chambrone 2006, Miyamoto et al 2006, Carnevale et al 2007, Faggion et al 2007, Fardal & Linden 2008, Matuliene et al 2008, Pretzl et al 2008, Ekuni et al 2009, Tsami et al 2009, Leininger et al 2010, Lorentz et al 2010, Martin et al 2010, Matuliene et al 2010, B€ aumer et al 2011, Martin et al 2011, Ng et al 2011, Costa et al 2012, Ravald & Johansson 2012, Costa et al 2013, Lv et al 2013, Costa et al 2014). The complete literature search process is reported in Figure 1.…”