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. 2009 Apr-Jun;54(2):159–167. doi: 10.4103/0019-5154.53195

Table 1.

Minimum period of stability in different studies

AuthorRef Year Period of stability
Das SS, Pasricha JS[62] 1992 4 months
Boersma BR, Westerhof W[39] 1995 6 months
Jha AK, Pandey SS, Shukla VK[63] 1992 1 year
Savant SS[40] 1992 2 years
Falabella R[33] 1995 2 years
Falabella R[15] 1992 3 years