function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boustani, Mira & Rosa, Paolo', 1],
    ['Evenhuis, Neal L. & O’Hara, James E. & Pape, Thomas', 1],
    ['Paukkunen, Juho & Berg, Alexander & Soon, Villu', 2],
    ['Paukkunen, Juho & Rosa, Paolo & Soon, Villu & Johansson, Niklas', 2],
    ['Rosa, Paolo', 1],
    ['Rosa, Paolo & Aswathi, Pokkattu Gopi & Bijoy, Chenthamarakshan', 1],
    ['Rosa, Paolo & Proshchalykin, Maxim Yu. & Halada, Marek', 2],
    ['Rosa, Paolo & Xu, Zai-fu', 1],
    ['Yildirim, E. & Strumia, F.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);