Depression and anxiety are not related to nummular headache. J Headache Pain.

Fernández-de-Las-Peñas C, Peñacoba-Puente C, López-López A, Valle B, Cuadrado ML, Barriga FJ, Pareja JA. Depression and anxiety are not related to nummular headache. J Headache Pain. 2009 Dec;10(6):441-5. doi: 10.1007/s10194-009-0161-z. PubMed PMID: 19820896; PubMed Central PMCID: PMC3476210.