Patient preference with respect to QoL and reduction in opioid‐induced constipation ( <scp>OIC</scp> ) after treatment with prolonged‐release ( <scp>PR</scp> ) oxycodone/naloxone compared with previous analgesic therapy [ <scp>PREFER</scp> study]Van Dongen, Frank Huygen, Pascal Vanelderen et al.|International Journal of Clinical Practice|2014Cited by 12