function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Capa, María & Murray, Anna', 4],
    ['Faulwetter, Sarah & Simboura, Nomiki & Katsiaras, Nikolaos', 2],
    ['Garcia-Garza, Maria Elena & de Leon-Gonzalez, Jesus Angel', 3],
    ['Nishi, Eijiroh & Gil, Joao & Tanaka, Katsuhiko', 1],
    ['Tovar-Hernandez, Maria Ana Ana & Garcia-Garza, Maria Elena', 4],
    ['Tovar-Hernández, María Ana & León-González, Jesús Ángel De', 3],
    ['Tovar-Hernández, María Ana & Salazar-Silva, Patricia', 1],
    ['Veeraiyan, Bharathidasan & Tovar-Hernández, María Ana', 1],
    ['Yanez-Rivera, Beatriz & Tovar-Hernandez, Maria Ana', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);