Elsevier updated their online platform for the Clinical Neurophysiology Journal. To create an account on that new platform you have to follow a one-time process to activate your personal subscription at ScienceDirect.
The instructions (ISIN registration number needed):
1. Click this link to find the subscription activation page
2. Enter your ISIN registration number that was forwarded per e-mail
3. Follow the steps to create your personal login
4. Enjoy the clinical journal 🙂
Questions regarding your ISIN registration number: email@example.com
Questions and assistance regarding your online subscription: EMEASocieties@elsevier.com