function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bertolino, Marco & Costa, Gabriele & Reboa, Anna', 1],
    ['Busutil, Linnet & García-Hernández, María R. & Díaz, M. Cristina', 3],
    ['Calcinai, Barbara & Bavestrello, Giorgio & Bertolino, Marco', 1],
    ['Calcinai, Barbara & Belfiore, Giuseppe & Pica, Daniela', 3],
    ['Campos, Maurício & Mothes, Beatriz & Eckert, Rafael', 1],
    ['Diaz, Maria Cristina & Nuttall, Marissa & Pomponi, Shirley A.', 1],
    ['Fassbender, Nico & Stefanoudis, Paris V', 1],
    ['Jaramillo, Karla B. & Condor-Lujan, Baslavi & Longakit, Belinda', 2],
    ['Lehnert, Helmut & Stone, Robert P.', 4],
    ['Samaai, Toufiek & Pillay, Ruwen & Janson, Liesl', 6],
    ['Schmidt, Eduard Oscar', 2],
    ['Topsent, Émile', 1],
    ['Ugalde, Diana & Fernandez, Julio C. C. & Gómez, Patricia', 3],
    ['Van Soest, Rob W. M.', 18],
    ['Van, Rob W. M.', 2],
    ['Other (1)', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    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);