Some empirical ethics research has also been conducted with patients, parents and mental health professionals concerning issues such as the ethics of compulsion and the impact of having an eating disorder on decision-making ( Serpell et al. 2004; Tan et al. 2008; Tan et al. 2010; Tan 2006; Newton et al. 2005; Serpell and Treasure 2002; Serpell et al. 1999).