The present invention relates generally to a method of extracting cobalt and other impurity metals from a concentrated nickel sulphate solution by a solvent extraction process whereby a cationic solvent extractant is separately pre-equilibrated with a portion of a purified nickel sulphate solution in such a manner that it is loaded with nickel without precipitating insoluble nickel double salts. Each leakage preventing side wall is formed of at least one side wall sheet to have an inner sheet portion facing the widthwise inner side of the absorbent article and an outer sheet portion facing the widthwise outer side of the absorbent article. A particularly preferred pharmaceutical formulation is disclosed that consists essentially of aqueous extracts of one or more of Bai Shao, Bai Zhu, Chen Pi, Fang Feng, together with one or more of Wu Mei, and Yan Hu. Historical records of an individual’s activity may be presented to the individual and authorized caregivers through secure web pages. The transform coefficient of the current image is set to a new value that is a function of the retrieved bits and bits of the transform coefficients of the current image are stored for use in compressing one or more subsequent images of the sequence.