function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Berek-Nagy, Peter Janos & Gergo Toth & Szilvia Bosze', 2],
    ['Lu, Wenhua & Dai, Dongqin & Lu, Li & Liu, Xiangfu & Wei, Xiaomei', 1],
    ['Tibell, Sanja & Tibell, Leif & Pang, Ka-Lai', 2],
    ['Xu, Li & Bao, Dan-Feng & Luo, Zong-Long & Su, Xi-Jun', 2],
    ['Yang, Yi & Zhang, Sheng-Nan & Yu, Xian-Dong & Liu, Jian-Kui', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=9)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);