function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Carvalho-Filho, Fernando S. & Cruz, Vanessa C.', 12],
    ['Dawah, Hassan A. & Abdullah, Mohammed A. & Deeming, John C.', 1],
    ['Ismay, Barbara & Ang, Yuchen', 2],
    ['Melo, Adriano S. & Wheeler, Terry A.', 1],
    ['Riccardi, Paula Raile', 2],
    ['Riccardi, Paula Raile & Pádua, Diego Galvão de', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);