<Table> <Tr> <Th_colspan="2"> Beau's lines </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Td_colspan="2"> Beau's lines </Td> </Tr> <Tr> <Th> Specialty </Th> <Td> Dermatology </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Beau's lines </Th> </Tr> <Tr> <Td_colspan="2"> Beau's lines </Td> </Tr> <Tr> <Th> Specialty </Th> <Td> Dermatology </Td> </Tr>

What do lines on your thumb nail mean