function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baker, C. F.', 1],
    ['Chamorro-Rengifo, Juliana & Braun, Holger', 1],
    ['Chobanov, Dragan P. & Lemonnier-Darcemont, Michèle', 1],
    ['Della Rocca, Francesca & Stefanelli, Silvia & Cardarelli, Elisa', 1],
    ['Desutter-Grandcolas, Laure', 4],
    ['Ghahari, H. & Havaskary, M. & Tabari, M. & Ostovan, H.', 4],
    ['Giuliano, Davide', 2],
    ['Goemans, Geert', 2],
    ['Monnerat C. & Thorens P. & Walter T. & Gonseth Y.', 4],
    ['Nagar, Rajendra & Swaminathan, R.', 2],
    ['Sergeev, M. G. & Storozhenko, S. Yu. & Benediktov, A. A.', 2],
    ['Skejo, Josip & Rebrina, Fran & Szövényi, Gergely', 4],
    ['Taylan, Mehmet Sait & Şirin, Deniz & Sevgili, Hasan', 3],
    ['Temreshev, Izbasar I. & Makezhanov, Arman M.', 2],
    ['Ünal, Mustafa', 4],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=42)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);