We would be grateful for any information about the availability of serum/plasma ouabain assay kits - either RIA or ELISA. Many thanks Walter S Watson Nuclear Medicine Dept Southern General Hospital NHS Trust Govan Road Glasgow Scotland, UK Phone 0(044) 141 201 1760 Fax 0(044) 141 201-1891 E-mail: [log in to unmask] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%