function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cianferoni, Fabio & Mazza, Giuseppe', 4],
    ['Cianferoni, Fabio & Rocchi, Saverio & Terzani, Fabio', 4],
    ['Cobben, R. H.', 9],
    ['Fent, Meral & Kment, Petr & Çamur-Elipek, Belgin & Kirgiz, Timur', 22],
    ['Ghahari, Hassan & Moulet, Pierre & Ostovan, Hadi', 11],
    ['Kment, Petr & Kolínová, Zdislava', 19],
    ['Larivière, Marie-Claude & Larochelle, André', 38],
    ['N. N. Vinokurov', 9],
    ['Norbiato, Margherita & Dioli, Paride & Cianferoni, Fabio', 9],
    ['Polhemus, John T. & Polhemus, Dan A.', 13],
    ['Reuter, Odo Morannal', 5],
    ['Riviaux, Senén Muñoz & Moreira, Felipe Ferraz Figueiredo', 6],
    ['Vinokurov, Nikolay N.', 13],
    ['Vinokurov, Nikolay N. & Kment, Petr', 38],
    ['Zhang, Weiting & Yao, Yunzhi & Ren, Dong', 6],
    ['Other (22)', 50]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=256)',
    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);