function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bertolino, Marco & Costa, Gabriele & Bavestrello, Giorgio', 2],
    ['Diaz, Maria Cristina & Nuttall, Marissa & Pomponi, Shirley A.', 1],
    ['Fassbender, Nico & Stefanoudis, Paris V', 3],
    ['Goodwin, Claire & Brickle, Paul', 1],
    ['Goodwin, Claire E. & Berman, Jade & Hendry, Katharine R.', 1],
    ['Pestana, Rosa & Ribeiro, Cláudia & Boury-Esnault, Nicole', 1],
    ['Samaai, Toufiek & Pillay, Ruwen & Janson, Liesl', 2],
    ['Sim-Smith, Carina & Hickman, Cleveland & Kelly, Michelle', 2],
    ['Ugalde, Diana & Gómez, Patricia & Simões, Nuno', 1],
    ['Van, Rob W. M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);