@misc{indiciae326297e2318d, title = {A modified Gluck method for the lecithin/sphingomyelin ratio with increased specificity and validity.}, author = {N H Huang and N F Besch and P K Besch and C M Hinkley}, year = {1981}, url = {https://pubmed.ncbi.nlm.nih.gov/7285333/}, note = {Source identifier: 7285333} }