function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Baba, Yuki G. & Tanikawa, Akio', 1],
    ['Candek, Klemen & Gregoric, Matjaz & Kostanjsek, Rok', 4],
    ['Dean, David Allen', 2],
    ['Della Rocca, Francesca & Stefanelli, Silvia & Cardarelli, Elisa', 2],
    ['Deltshev, Christo & Komnenov, Marjan & Blagoev, Gergin', 6],
    ['Marusik, Yuri M. & Azarkina, Galina N. & Omelko, Mikhail M.', 1],
    ['Nzigidahera, Benoît & Jocqué, Rudy', 4],
    ['Paschetta, Mauro & Christille, Claretta & Marguerettaz, Fabio', 3],
    ['Telfer, Angela C & Young, Monica R & Quinn, Jenna & Perez, Kate', 3],
    ['Trilikauskas, L. A. & Sergeev, M. E.', 1],
    ['Álvarez-Padilla, Fernando & Hormiga, Gustavo', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);