PHILIP BECKMANN

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The aim of this study was to investigate, by means of transcranial Doppler ultrasound (TCD), cerebrovascular reactivity during the Valsalva maneuver (VM) during the headache-free interval in patients with migraine (M), migraine plus tension-type headache (M+TTH), and migraine plus medication overuse headache (M+MOH). A total of 114 patients (n=60 M, n=38(More)
Since its founding in 1963, The Boston Consulting Group has focused on helping clients achieve competitive advantage. Our firm believes that best practices or benchmarks are rarely enough to create lasting value and that positive change requires new insight into economics and markets and the organizational capabilities to chart and deliver on winning(More)