 - The mean of 2 iPTH determinations within 21 days before randomization and drawn at least 2 days apart must be greater than or equal to 300 pgmL 31.8 pmolL and less than 800 pgmL 84.8 pmolL. If biPTH is determined, the mean levels must be greater than or equal to 150 pgmL 15.9 pmolL and less than 410 pgmL 43.5 pmolL 