Protection of ADE7816 V and I analog inputs


What is the recommendation for protecting the VAP, VAN, IAP-IFP and IAN-IFN inputs of the ADE7816?  Previously it has been recommended to use back-to-back diodes to ensure the maximum voltage across the inputs does not exceed +/-2V.  Is this still the suggested approach?  If not, please provide the recommended protection scheme. Thanks,