G. Al-Timimi, S. Al-Mashhadani, and M. Al-Waiz, “Doxycycline In Pityriasis Rosea: Placebo- Controlled Clinical Trial”, JFacMedBagdad, vol. 49, no. 1, pp. 130–134, Apr. 2007, doi: 10.32007/jfacmedbagdad.4911434.