preferred_name: Amniotic fluid: [L/S ratio] or [lecithin] or [sphingomyelin] (finding)
preferred_name_lc: amniotic fluid: [l/s ratio] or [lecithin] or [sphingomyelin] (finding)
label: Amniotic fluid: [L/S ratio] or [lecithin] or [sphingomyelin] (finding)
label_lc: amniotic fluid: [l/s ratio] or [lecithin] or [sphingomyelin] (finding)