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IMPORTANT NOTE: Please note that to make a payment at the moment due to a Paypal policy change, we need you to select the Paypal Button below instead of entering your credit card. Create your profile and enter all info except your credit card data, then make sure the paypal button is selected.

We are working on fix, but this will ensure things go through successfully! Thanks for your patience and understanding!

Kind Regards, the OPF


One year full Paper and PDF Subscription to the Journal

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