function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Araya, Juan Francisco', 1],
    ['Cavallari, Daniel C. & Dornellas, Ana Paula S.', 1],
    ['Costa, Dimitri de Araujo & Dolbeth, Marina & Prata, Jessica', 1],
    ['Ferreira, João Paulo Ramos & Legat, Angela Puchnick', 3],
    ['Ivanova, Mariya B. & Tsurpalo, Alexandra P.', 1],
    ['Lam, Katherine & Morton, Brian', 1],
    ['Lutaenko, K. A. & Artemieva, N. G.', 1],
    ['Tëmkin, Ilya', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=10)',
    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);