To the Editor: Willingness to pay (WTP) is a preference-based method that can be assessed by directly asking patients what amount they would be willing to pay to cure or improve their health condition.1,2 This intuitive method directly reflects the impact of the disease on a patient's life, including the psychological aspect, whereas the Dermatology Life Quality Index (DLQI) has some drawbacks in that it does not measure a patient's preference or desire for a cure of skin disease.3 There are limited studies on investigating and comparing the WTP and DLQI across a variety of chronic skin diseases.
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Bae et al. (2020) studied this question.
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