function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dursun, A. & Fent, M.', 6],
    ['Dursun, Ahmet & Fent, Meral', 1],
    ['Ghahari, Hassan & Moulet, Pierre & Rider, David A.', 3],
    ['Heiss, Ernst & AndreasE & Lederwasch, Manfred & RomedU', 12],
    ['Laterza, Ilaria & Tamburini, Giovanni & Panzarino, Onofrio', 2],
    ['Linnavuori, Rauno E.', 4],
    ['Neimorovets, Vladimir', 7],
    ['Norbiato, Margherita & Dioli, Paride & Cianferoni, Fabio', 4],
    ['TASZAKOWSK, Artur & PASIŃSKA, Agnieszka', 1],
    ['Vinokurov, N. N. & Rudoi, V. V.', 1],
    ['Vinokurov, Nikolay N. & Rudoi, Valentin V.', 2],
    ['Walker, Francis', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=44)',
    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);