function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arteaga, Alejandro & Batista, Abel', 4],
    ['Arteaga, Alejandro & Salazar-Valenzuela, David & Mebert, Konrad', 1],
    ['Guedes, Thaís B. & Nogueira, Cristiano & Marques, Otavio A. V.', 1],
    ['Lotzkat, Sebastian & Hertz, Andreas & Köhler, Gunther', 2],
    ['Nogueira, Cristiano C. & Argôlo, Antonio J. S.', 1],
    ['Restrepo, Adriana & Molina-Zuluaga, Claudia & Hurtado, Juan P.', 1],
    ['Rovito, Sean M. & Papenfuss, Theodore J.', 1],
    ['Vera-Pérez, Luis Enrique', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);