function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Faubel, A. & Warwick, R. M.', 4],
    ['Houben, Albrecht M. & Schwank, Peter & Proesmans, Willem', 1],
    ['João A. L. Braccini & Francisco Brusa & Ana M. Leal-Zanchet', 1],
    ['Steenkiste, Niels Van & Volonterio, Odile & Schockaert, Ernest', 1],
    ['Zhong, Lin-Hong & Xie, Yao-Hang & Hu, Xiao-Zhou & Chen, Yu-Si', 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);