In Granado v. Workmen's Comp. App. Bd. (1968) 69 Cal.2d 399, the California Supreme Court provided the following summary of its reasons for holding that section 4663 did not permit apportionment of temporary disability: "In view of the ambiguity of the statute, the rule of liberal construction, the delays which will necessarily result if temporary disability is made apportionable, the resulting frustration of the legislative policy of making temporary disability a substitute for lost wages, and our public policy of expeditious payment, we conclude that temporary disability is not apportionable." ( Id., at p. 405.) The California Supreme Court held that medical expenses are clearly nonapportionable. The court held that section 4663 only applied to disability compensation and that none of the sections dealing with medical or hospital treatment suggest that the employer may pay only part of such expenses. In concluding that medical expenses were nonapportionable, the court pointed to the adverse consequences which would flow from apportionment: "If medical expense reasonably necessary to relieve from the industrial injury were apportionable, a workingman, who is disabled, may not be able to pay his share of the expenses and thus forego treatment. Moreover, the uncertainties attendant to the determination of the proper apportionment might cause employers to refuse to pay their share until there has been a hearing and decision on the question of apportionment, and such delay in payment may compel the injured workingman to forego the prompt treatment to which he is entitled." ( Id., at p. 406.)