function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Eisig, Hugo', 1],
    ['Faulwetter, Sarah & Simboura, Nomiki & Katsiaras, Nikolaos', 2],
    ['Garcia-Garza, Maria Elena & Leon-Gonzalez, Jesus Angel De', 2],
    ['Mikac, Barbara', 1],
    ['Salazar-Vallejo, Sergio I. & Carrera-Parra, Luis F.', 1],
    ['Silva, Camila Fernanda Da & Amaral, Antonia Cecilia Zacagnini', 3],
    ['Tomioka, Shinri & Yoshida, Ryuta & Kajihara, Hiroshi', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);