function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calcinai, Barbara & Bavestrello, Giorgio & Bertolino, Marco', 21],
    ['Ekins, Merrick & Erpenbeck, Dirk & Hooper, John N. A.', 29],
    ['Goodwin, Claire & Brickle, Paul', 15],
    ['Goodwin, Claire E. & Berman, Jade & Hendry, Katharine R.', 16],
    ['Göcke, Christian & Janussen, Dorte', 61],
    ['Kelly, Michelle & Sim-Smith, Carina & Stone, Robert', 19],
    ['Lehnert, Helmut & Stone, Robert P.', 22],
    ['Rützler, Klaus & Piantoni, Carla & Van, Rob W. M.', 22],
    ['Samaai, Toufiek & Gibbons, Mark J. & Kelly, Michelle', 42],
    ['Schejter, Laura & Cristobo, Javier & Ríos, Pilar', 22],
    ['Ugalde, Diana & Fernandez, Julio C. C. & Gómez, Patricia', 18],
    ['Vacelet, Jean', 15],
    ['Van Soest, Rob W. M.', 35],
    ['Van, Rob W. M.', 43],
    ['Van, Rob W. M. & Aryasari, Ratih & De, Nicole J.', 93],
    ['Other (114)', 492]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=965)',
    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);