 (Schipper 1993:167) Some contemporary researchers (such as Yan et al. 2002) are clinically investigating bigu fasting.
<clarity>  (Schipper 1993:167) Some contemporary researchers (such as Yan et al. 2002) are clinically investigating bigu fasting.
 (Schipper 1993:167) Some contemporary researchers are clinically investigating bigu fasting.