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 _    _     _____    _    _      ___       _____  
| || | ||  |  ___|| | \  / ||   / _ \\    / ___// 
| || | ||  | ||__   |  \/  ||  | / \ ||   \___ \\ 
| \\_/ ||  | ||__   | .  . ||  | \_/ ||   /    // 
 \____//   |_____|| |_|\/|_||   \___//   /____//  
  `---`    `-----`  `-`  `-`    `---`   `-----`

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Text this: Difference in striae periodicity of Heilongjiang and Singaporean Chinese teeth