Changes in Version 0.9.9 (2018-04-18)
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  * Renamed some function arguments for consistency, clarity and aesthetic reasons
  
  * Added medication dataset from the accompanied website of Singer & Willett (2003)
  
  * Removed redundant bootstrap estimates from summary.clusbootglm()
  
  * Added and prettified some error handlings
  
  * Changed confint() interval.type argument default to match the one from summary() (BCa interval)