Nano scale
topography description		 Evaluation methods
and timing description		 Significance of result
indicated in the study (P < 0.05)
Gittens et al. 2012 [24] No Not complete Yes
Gittens et al. 2012 [25] Yes Not complete Yes
Gittens et al. 2011 [26] Not complete Not complete Yes
Tetè et al. 2010 [31] Not complete Yes No
Rani et al. 2012 [44] Not complete Yes Yes
Zhuang et al. 2014 [45] Not complete Yes Yes
Portan et al. 2012 [50] No Yes No
Dimitrievska et al. 2011 [52] Not complete Yes Yes
Mazzola et al. 2011 [55] Not complete Not complete No
Ross et al. 2013 [57] Not complete Yes Yes