function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carter, H. J.', 1],
    ['Cruz-Barraza, José Antonio & Carballo, José Luis', 2],
    ['Diaz, M. C. & Soest, Van & Rützler, K. & Guzman, H. M.', 2],
    ['Diaz, Maria Cristina & Nuttall, Marissa & Pomponi, Shirley A.', 5],
    ['Gómez, Patricia & González-Acosta, Bárbara', 5],
    ['Göcke, Christian & Janussen, Dorte', 3],
    ['Manconi, Renata & Cadeddu, Barbara & Ledda, Fabio', 2],
    ['Pinheiro, Ulisses Dos S. & Hajdu, Eduardo & Custódio, Márcio R.', 18],
    ['Rützler, Klaus & Piantoni, Carla & Van, Rob W. M.', 5],
    ['Ugalde, Diana & Fernandez, Julio C. C. & Gómez, Patricia', 7],
    ['Van Soest, Rob W. M.', 1],
    ['Van, Rob W. M.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=54)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 12, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);