<qa>  What is the minimum administration time for bolus injection?Control Group Placebo will be in the form of normal saline administered over same time period as equivalent Ferinject administration. IV drip infusion or undiluted bolus injection with a minimum administration time of 15 minutes 200mL as infusion or 20mL as bolus injection for body weight 50 Kg or 6 minutes 100mL normal as infusion or 10mL as bolus injection for body weight 50 Kg. 