function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dai, Jin-Hong & Wang, Rui & Jing, Kai & Ma, Li-Bin', 2],
    ['Gu, J. X. & Dai, L. & Huang, J. H.', 2],
    ['Yang, C. & Wei, Z. - D. & Liu, T. & Liu, H. - Y.', 2],
    ['Yuan, Li-Lan & Xu, Fei & Wang, Xiao-Xiao & Zhang, Dong-Xiao', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=7)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 4, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);