function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 6],
    ['Fiorito, Serena & Epifano, Francesco & Preziuso, Francesca', 1],
    ['Jarvis, Charlie', 2],
    ['Suh, Soo-Jung', 1],
    ['Wen, Jun & Krupnick, Gary & Esser, Hans-Joachim', 1],
    ['Zhang, Xiaoping & Chen, Ze-Yan & Qiu, Zi-Dong & Liu, Mingxing', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);