| Seynaeve et al. (2011) | Moderate | Weak | Strong | Moderate | Strong | Moderate | Moderate |
| Shuldham et al. (2008) | Moderate | Moderate | Moderate | Moderate | Strong | Moderate | Strong |
| Tarnow-Mordi et al. (2000) | Moderate | Moderate | Moderate | Moderate | Strong | Moderate | Strong |
| Tervo-Heikkinen et al. (2008) | Weak | Weak | Strong | Moderate | Moderate | Moderate | Weak |
| Twigg et al. (2010) | Moderate | Moderate | Strong | Moderate | Strong | Moderate | Strong |
| Unruh (2002) | Moderate | Weak | Strong | Moderate | Strong | Moderate | Moderate |
| Van den Heede et al. (2009) | Moderate | Weak | Strong | Moderate | Strong | Moderate | Moderate |
| Volpe et al. (2014) | Moderate | Weak | Weak | Moderate | Strong | Strong | Weak |
| Stegenga et al. (2002) | Moderate | Weak | Weak | Moderate | Strong | Moderate | Weak |
| Stone et al. (2007) | Moderate | Weak | Strong | Moderate | Strong | Moderate | Moderate |
| Thomas-Hawkins et al. (2008) | Weak | Weak | Strong | Moderate | Strong | Moderate | Weak |
| Wissman et al. (2007) | Moderate | Weak | Strong | Moderate | Moderate | Moderate | Moderate |
| Yang (2003) | Moderate | Weak | Moderate | Moderate | Strong | Moderate | Moderate |
| Zhu et al. (2012) | Strong | Weak | Strong | Moderate | Strong | Moderate | Moderate |