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Citation: D. Vaitl et al., Natural very-low-frequency sferics and headache, INT J BIOM, 45(3), 2001, pp. 115-123

Authors: Vaitl, D Propson, N Stark, R Walter, B Schienle, A

Citation: D. Vaitl et al., Headache and sferics, HEADACHE, 41(9), 2001, pp. 845-853