Clinical details and migraine history.

Abbreviations: Age, age in years; Sex, male (M)/female(F); Age at onset, age the headaches started in years; Frequency, number of attacks per month (median values are given in brackets); Duration, duration of illness in years; Side, dominant side of headache pain, left(L)/right(R); Allodynia, patients reporting at least one type of skin hypersensivity during migraine.