function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Appolloni, Massimo & Smriglio, Carlo & Amati, Bruno', 1],
    ['Benaim, Natalia Pereira & Absalao, Ricardo Silva', 4],
    ['Foster, William J. & Danise, Silvia & Twitchett, Richard J.', 6],
    ['Gao, Qi & Tang, Yan & Zhang, Junlong', 2],
    ['Gofas, Serge & Luque, Ángel A. & Oliver, Joan Daniel', 6],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 3],
    ['Hryniewicz, Krzysztof & Amano, Kazutaka', 6],
    ['Hryniewicz, Krzysztof & Little, Crispin T. S.', 3],
    ['Jirapatrasilp, Parin & Cuny, Gilles & Kocsis, László', 2],
    ['Lam, Katherine & Morton, Brian & Leung, K. F.', 1],
    ['Pacaud, Jean-Michel', 1],
    ['Petit, Richard E.', 2],
    ['Raines, Bret & Huber, Markus', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=41)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);