| http://www.w3.org/ns/prov#value | - A further embodiment of the present invention is a method of treating a host harboring a tumor comprising the steps of i) administering to the host as a first agent a water soluble hydroxy-substituted texaphyrin retaining lipophilicity, ii) determining localization sites in the host by monitoring texaphyrin concentrations, iii) administering to the host as a second agent a water soluble hydroxy-su
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