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  ______     ___      ____       ___      _  __  
 /_   _//   / _ \\   |  _ \\    / _ \\   | |/ // 
 `-| |,-   / //\ \\  | |_| ||  | / \ ||  | ' //  
   | ||   |  ___  || | .  //   | \_/ ||  | . \\  
   |_||   |_||  |_|| |_|\_\\    \___//   |_|\_\\ 
   `-`'   `-`   `-`  `-` --`    `---`    `-` --`

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Text this: Identification of focal ARDS using PF ratio: a cross-sectional study