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Houle, Timothy T., Dana P. Turner, Adrienne N. Golding, John A. H. Porter, Vincent T. Martin, Donald B. Penzien, und Charles H. Tegeler. "Forecasting Individual Headache Attacks Using Perceived Stress: Development of a Multivariable Prediction Model for Persons With Episodic Migraine." Headache 2017.

Houle, Timothy T., et al. "Forecasting Individual Headache Attacks Using Perceived Stress: Development of a Multivariable Prediction Model for Persons With Episodic Migraine." Headache 2017.