Does microneedling/dermarolling help with hair growth if minoxidil is also used? I read a study from India that it does.

That tested 100 males using a 1.5 mm roller once a week, with 5% minoxidil twice daily for 3 months showing much better results the the group who only used minoxidil primarily. The is 1.5 mm to long? Could it kill the hair follicles on thin parts of the head? Thabk you for your help.