Dear Sirs, I herewith order one copy of executor/DOS. Mailing address: PD Dr. O.W. Witte Department of Neurology Heinrich Heine University Moorenstr. 5 D-40225 Duesseldorf Germany Please send an invoice. Unfortunately, we cannot make prepayment. Otto W. Witte Priv.-Doz. Dr. Otto W. Witte Neurologische Klinik Heinrich Heine Universitaet Moorenstr. 5 D40225 Duesseldorf Germany Fax.: +49-211-342229 Tel.: +49-211-311-8977