How many alpha and beta chains are present in a HbA molecule?

Low-risk CSPs, before administration, cannot be stored longer than 24 hours at room temperature

Indicate whether the statement is true or false

Which of the following is a code specification for elevator hoistways?

A. Sprinkler heads must protect the shaft and appropriate suppression systems must protect the motor. B. No wiring, ductwork, or piping should be run within the hoistway unless it is required for the elevator. C. Hoistways must be an essential element of the structure's strength and compartmentalized to reduce fire spread. D. Elevator hoistway enclosures are usually required to be fire-rated assemblies with a 4-6 hour rating.