Nizoral CREAM vs Nizoral shampoo

[whynot]

When people talk of Nizoral's efficacy as a growth stimulant, usually the example of the Japanese study comes up. However - it states plainly here that a CREAM was used in conjunction with regular shampoos, as opposed to the 2% shampoo. Does this mean that the Nizoral SHAMPOO isn't a truly effective method of getting ketoconazole all up in our scalp's binnis?