Real-time polymerase chain reaction (PCR) was performed on MX-3000P Real-Time PCR Instrument (Stratagen, US) using Beacon Real-Time PCR Universal Reagent (Cat# GMRS-001, GenePharma, Shanghai) and with U6 snRNA as the internal control.
Imaging was performed in the contact mode with a Nanoscope II AFM (Bruker - Digital Instruments, Santa Barbara, CA, US) using oxide-sharpened 'twin-tip' Si3N4 cantilevers with a spring constant of 0.06 N/m.
The piezoscanner (14 mm, D scanner, Bruker - Digital Instruments, Santa Barbara, CA, US) was calibrated using a variety of samples including mica and the cholera toxin B subunit.
In addition, the use of nine instruments allows us to test for over-identification using the Hansen J test, which we cannot reject in any of the specifications, providing suggestive evidence that the instruments are uncorrelated with the error term.
Of course, using lags as instruments requires us to drop the first decadal change, which corresponds to half our sample.
Everybody just lent us instruments, and lent us a hand basically the whole way through.
However, use of self-report instruments allows us to obtain more information on differences in the severity of depression.
Randomizing the order in which participants used the 2 assessment instruments allowed us to probe whether the order affected their responses to items in the new assessment instrument.
Although such a phenomenological interpretation is still useful, high quality X-ray data from contemporary instruments allow us to test more realistic accretion disk models.
