function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calcinai, Barbara & Belfiore, Giuseppe & Pica, Daniela', 2],
    ['Carballo, José Luis & Cruz-Barraza, José Antonio', 1],
    ['Fassbender, Nico & Stefanoudis, Paris V', 3],
    ['Marlow, Joseph & Bell, James J. & Shaffer, Megan & Haris, Abdul', 2],
    ['Rützler, Klaus & Piantoni, Carla & Van, Rob W. M.', 1],
    ['Samaai, Toufiek & Pillay, Ruwen & Janson, Liesl', 4],
    ['Sutcliffe, Patricia R. & Hooper, John N. A. & Pitcher, Roland', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);