function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dai, Wu & Zhang, Yalin & Viraktamath, C. A. & Webb, M. D.', 2],
    ['Gnezdilov, Vladimir M.', 5],
    ['Khatri, Imran & Webb, Michael D.', 2],
    ['Mozaffarian, Fariba', 1],
    ['Mozaffarian, Fariba & Wilson, Michael R.', 4],
    ['Rajgopal, N. N. & Dey, Debjani', 1],
    ['Shah, Bismillah & Naveed, Hassan & Duan, Yani', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);