function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alekseev, Vitalii I.', 1],
    ['Bezděk, Aleš & Hájek, Jiří & Ascr, Biology Centre', 6],
    ['Dupuis, Fabien', 1],
    ['Kirby, William', 3],
    ['Mitter, Heinz', 2],
    ['Perissinotto, Renzo & Clennell, Lynette', 5],
    ['Polat, Alper & Yildirim, Erol & Uliana, Marco', 3],
    ['Ruchin, Alexaner B. & Egorov, Leonid V. & Alekseev, Sergei K.', 1],
    ['Stefanelli, Silvia & Della Rocca, Francesca & Bogliani, Giuseppe', 2],
    ['Vitali, Francesco', 1],
    ['Weber, Friedrich', 4],
    ['Ziani, Stefano & Bezděk, Aleš & Branco, Tristão', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=31)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);