I thoroughly concur with Glueball on this, although, like him, I'm not a B737 jock any more - the principals are the same.
To put you in the comfort zone, 15 Kt below Vref for a B737 should still be above the stall, so the aircraft is flyable.Remember that Vref is 1.3 X Vs, whereas V2 (min) is 1.2 X Vs, so, although we don't have V2s for Landing Flap, a speed a bit below Vref should be no more dangerous (from a stall point of view) than for a Takeoff. If for example, Vs was 100 Kt, V2 would be 120 Kt, and Vref 130 Kt, so 10 Kt below Vref is totally survivable.
For all of the techniques Glueball describes, use them, they'e good value.
Regards,
Old Smokey