function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dai, Wu & Zhang, Yalin', 1],
    ['Li, Hu & Dai, Ren Huai & Li, Zi Zhong', 2],
    ['Li, Hu & Dai, Ren-Huai & Li, Zi-Zhong', 8],
    ['Li, Hu & Li, Juan & Dai, Ren-Huai', 8],
    ['Li, Hu & Li, Juan & Webb, Michael D. & Wang, Jia-Jia', 7],
    ['Okudera, Shigeru & Hayashi, Masami', 3],
    ['Yang, Liyuan & Zhang, Yalin', 2],
    ['Zhang, Bin', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=34)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);