function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ale-Rocha, Rosaly & Freitas-Silva, Rafael Augusto Pinheiro De', 1],
    ['Dale E. Greenwalt & Daniel J. Bickel & Peter H. Kerr', 1],
    ['El-Hawagry, Magdi S. & Abdel-Dayem, Mahmoud S.', 1],
    ['González, Christian R. & Elgueta, Mario & Ale-Rocha, Rosaly', 2],
    ['Grootaert, Patrick & Shamshev, Igor', 5],
    ['Grootaert, Patrick & Shamshev, Igor V.', 7],
    ['Meigen, Johann Wilhelm', 1],
    ['Michelsen, Verner & Grootaert, Patrick', 8],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 2],
    ['Solórzano Kraemer, Mónica M. & Sinclair, Bradley J.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    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);