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Table 1 Characteristics of excluded studies

From: Dairy products and colorectal cancer in middle eastern and north African countries: a systematic review

Author; date Country Type of study Exclusion criteria
Abbastabar et al., (2015) [34]. Iran Ecological study Risk not specified.
Khoury et al., (2014) [39]. Lebanon Experimental study. Experimental Research in vitro using cell line and cell culture.
Rohani et al., (2013) [35]. Iran Ecological study Risk not specified.
Habib et al., (2013) [38]. United Arab Emirates Experimental study. Experimental research in vitro using culture of cell.
Attaallah et al., (2012) [36]. Turkey Experimental study. Experimental Research in vivo using rats.
Bener et al., (2010) [41]. Qatar Case control study Not examine the relationship between dairy products and CRC.
Almurshed et al., (2009) [40]. Saudi Arabia Case control study Not examine the relationship between dairy products and CRC.
Can et al., (2009) [42]. Turkey Clinical trial Study the quality of life in patients being treated for CRC.
Topuz et al., (2008) [43]. Turkey Randomized prospective observational study Examine the effect of oral kefir administration on serum pro-inflammatory cytokine levels in patients with CRC.
Cenesiz et al., (2008) [37]. Turkey Experimental study. Experimental research in vivo using mice.