function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bosmans, Robert & Cardoso, Pedro & Crespo, Luis Carlos', 1],
    ['Buyck, Bart & Eyssartier, Guillaume & Armada, François', 1],
    ['Haelewaters, Danny & Kesel, Andre De', 2],
    ['Lapeva-Gjonova, Albena & Santamaria, Sergi', 1],
    ['Rossi, Walter & Feijen, Hans R.', 5],
    ['Rossi, Walter & Leonardi, Marco', 4],
    ['Santamaria, Sergi & Enghoff, Henrik & Reboleira, Ana Sofia', 2],
    ['Santamaria, Sergi & Pedersen, Jan', 233],
    ['Santamaría, Sergi & Enghoff, Henrik & Reboleira, Ana Sofía P. S.', 9],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 13]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=271)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);